The Collaborative International Dictionary of English v.0.48:

Celiac \Ce"li*ac\, a. (Anat.)
   See C[oe]llac.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Coeliac \C[oe]"li*ac\, Celiac \Ce"li*ac\, a. [L. coeliacus, Gr.
   ?, fr. ? belly, fr. koi^los hollow.]
   Relating to the abdomen, or to the cavity of the abdomen.
   [1913 Webster]

   C[oe]liac artery (Anat.), the artery which issues from the
      aorta just below the diaphragm; -- called also c[oe]liac
      axis.

   C[oe]liac flux, C[oe]liac passion (Med.), a chronic flux
      or diarrhea of undigested food.
      [1913 Webster]

WordNet (r) 3.0 (2006):

celiac
    adj 1: belonging to or prescribed for celiac disease; "a celiac
           diet"
    2: of or in or belonging to the cavity of the abdomen [syn:
       coeliac, celiac]